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asciitopgm(1) [debian man page]

asciitopgm(1)						      General Commands Manual						     asciitopgm(1)

NAME

       asciitopgm - convert ASCII graphics into a portable graymap

SYNOPSIS

       asciitopgm [-d divisor] height width [asciifile]

DESCRIPTION

       Reads ASCII data as input.  Produces a portable graymap with pixel values which are an approximation of the "brightness" of the ASCII char-
       acters, assuming black-on-white printing.  In other words, a capital M is very dark, a period is ver light, and a space	is  white.   Input
       lines which are fewer than width characters are automatically padded with spaces.

       The  divisor  argument  is  a  floating-point number by which the output pixels are divided; the default value is 1.0.  This can be used to
       adjust the brightness of the graymap: for example, if the image is too dim, reduce the divisor.

       In keeping with (I believe) Fortran line-printer conventions, input lines beginning with a + (plus) character are assumed  to  "overstrike"
       the previous line, allowing a larger range of gray values.

       This tool contradicts the message in the pbmtoascii manual: "Note that there is no asciitopbm tool - this transformation is one-way."

BUGS

       The table of ASCII-to-grey values is subject to interpretation, and, of course, depends on the typeface intended for the input.

SEE ALSO

       pbmtoascii(1), pgm(5)

AUTHOR

       Wilson H. Bent. Jr. (whb@usc.edu)

								 26 December 1994						     asciitopgm(1)

Check Out this Related Man Page

ppmtopgm(1)						      General Commands Manual						       ppmtopgm(1)

NAME

       ppmtopgm - convert a portable pixmap into a portable graymap

SYNOPSIS

       ppmtopgm [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as  input.  Produces a portable graymap as output.  The output is a "black and white" rendering of the original
       image, as in a black and white photograph.  The quantization formula used is .299 r + .587 g + .114 b.

       Note that although there is a pgmtoppm program, it is not necessary for simple conversions from pgm to ppm , because any  ppm  program  can
       read  pgm  (and	pbm  ) files automatically.  pgmtoppm is for colorizing a pgm file.  Also, see ppmtorgb3 for a different way of converting
       color to gray.  And ppmdist generates a grayscale image from a color image, but in a way that makes it easy to differentiate  the  original
       colors, not necessarily a way that looks like a black and white photograph.

QUOTE

       Cold-hearted orb that rules the night
       Removes the colors from our sight
       Red is gray, and yellow white
       But we decide which is right
       And which is a quantization error.

SEE ALSO

       pgmtoppm(1),ppmtorgb3(1),rgb3toppm(1),ppmdist(1),ppm(5),pgm(5)

AUTHOR

       Copyright (C) 1989 by Jef Poskanzer.

								   10 April 2000						       ppmtopgm(1)
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